If such a thing happened I would not be surprised. From a practical point of view I would tend to doubt it. BB barrels I have seen tended to be thin, I don't know if their would be much meat left after groves cut. Another problem is the complaint back then about 'kings muskets' being illy boared.
Cutting off a barrel, taking some weight off the stock, adding sight makes some sence. As for making a rifle out of a bess, I would tend to think a bess might be scavenged for parts. A Gunsmith who could rifle a barrel could easily strip a bess and turn that metal in to a nice brass mounted rifle gun.
Lots of African and Indian guns were made with bess parts but I don't recall any American rifle gun with a bess lock. however, how many brass thimbles, side plates,butt plates ect started out as bess castings?
Cutting off a barrel, taking some weight off the stock, adding sight makes some sence. As for making a rifle out of a bess, I would tend to think a bess might be scavenged for parts. A Gunsmith who could rifle a barrel could easily strip a bess and turn that metal in to a nice brass mounted rifle gun.
Lots of African and Indian guns were made with bess parts but I don't recall any American rifle gun with a bess lock. however, how many brass thimbles, side plates,butt plates ect started out as bess castings?